The method adopted by this system is to call the function cv2.GaussianBlur () in OpenCV. This function needs to specify the width and height of Gaussian kernel (which must be odd numbers) and the standard deviation of Gaussian function along X, Y directions. If only the standard deviation in the x direction is specified, the same value will be taken in the y direction. If both standard deviations are 0, then the function will calculate itself according to the size of the kernel function. Gaussian filtering can effectively remove Gaussian noise from images.
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